Sounds better than ever Bring the party anywhere Make a splash with IPX7 Waterproof design Crank up the fun with PartyBoost Tough as it sounds Bluetooth® version: 4.2 Support: A2DP V1.3, AVRCP V1.6 Transducer: 44mm x 80mm Rated power: 20W RMS Frequency response: 65Hz-20kHz Signal-to-noise ratio: >80dB Battery type: Lithium-ion Polymer 17.28Wh (Equivalent to 3.6V 4800mAh) Battery charge time: 2.5 hours (5V/3A) Music playtime: up to 12 hours (varies by volume level and audio content) Bluetooth® transmitter power: 0-11dBm Bluetooth® transmitter frequency range: 2.402 - 2.480GHz Bluetooth® transmitter modulation: GFSK, p/4 DQPSK, 8DPSK